p.424-425
17. Reaction require collisions between molecules with
sufficient energy to break and form bonds.
18. No, not every collision between reactants results in products
being formed. THE CORRECT ORIENTATION of the molecules
involved in reacting is the other factor.
19. The number of atoms, ions, or molecules that react in a given
time to form products.
20.a) temperature: usually speeds up a reaction
b) concentration: speeds up a reaction
c) particle size: speeds up a reaction
d) inhibitor: slows down a reaction
21. A catalyst increases the rate of spontaneous reaction by
providing a reaction mechanism with a lower activation energy.
Title: Apr 5-11:17 AM (1 of 3)

22. a) false b) false c) true
23. Gas and oxygen mix readily but do not have enough
energy to react at room temp. The flame raises the temp and
energy of collision, and the reaction rate is increased. The
heat released by the reaction maintains the high temp and the
reaction continues spontaneously.
Title: Apr 5-11:28 AM (2 of 3)

Title: Apr 5-11:49 AM (3 of 3)